Sources for English meaning, indicating that it is (a) slang and (b) Brit.:

http://www.londonslang.com/db/b/
bell-end - end of penis. Comes from it's [sic] shape. Can be applied to a person as an insult "You total bell-end!".

http://english2american.com/dictionary/b.html
bell end n. This is the end of one's nob, which devoid of a foreskin looks not completely unlike a church bell.

http://www.answers.com/topic/body-parts-slang
Glans Penis ("head") [=] Bell end

http://www.urbandictionary.com/define.php?ter...
1. bellend
British slang for the glans penis, or penis head.

disregarding whether DanielUK has correctly posted or not...

the definitions and sources offered by Mike E. are clear enough, and the translation is 'technically' correct.

but the references are unanimous in calling 'bell-end' *slang*, and I have my doubts as to whether 'Eichel' is of the same stylistic level of language.

what is, then, the German *slang* equivalent?

if one exists, then *it* should be the one used in an entry.
if one doesn't exist, then the English side should be flagged [slang]

@odondon irl: bell end and Eichel are different levels, but as far as I know, there is no German slang. I don't know everything in this field, but I should have heard it, in all those years.

Eichel ist keine Umgangssprache. Eine umgangssprachliches Wort dafür fällt mir allerdings nicht ein, wenn wird eigentlich gleich der komplette Penis mit anderen Worten belegt.

Es gibt bestimmt Massen von Bezeichnungen. Mir fällt jetzt gerade mal nur "Schwanzspitze" ein.

And right at the end is the Jap's eye. Apologies for my vulgar slang, but at least it's used appropriately for once.

Thanks for the interesting discussion. I agree there doesn't seem to be a real german slang counterpart. Now, if "bell end" is brit slang, my question would be: is there a genuine american slang equivalent?
Oh, btw.: "jap's eye" is also called "one eye" if i'm not mistaken...

I've only heard 'one-eye' used in the context of 'one-eyed trouser snake'...

I'd say "dickhead" and "peckerhead" are equivalent AE slang terms used for a foolish, stupid, incompetent, or objectionable person. While both words clearly refer to the same part of the male anatomy as "bell end", I have only encountered them in the figurative sense, whereas "bell end" is apparently used in both literal and figurative senses.

mushroom tip ?

Besucher-Stories: "Der Geburtstag"
"Ich gab mein bestes, spielte mit Zunge an der Eichel, während meine eine Hand seiner Eier ... ."

Seems that in this context "Eichel" could mean either the head of the penis or the entire penis (shaft), which gives the slang expression "to give head", meaning to have oral sex.