Psyche

To fake someone out. To lead someone on and then to immediately decline an ending.

https://www.urbandictionary.com/define.php?te...

Siehe auch: psych - reingelegt

Example, Hey, look a monster behind you. Psych or sike or what?

When you are saying like haha, I got you or something like that.

https://forum.wordreference.com/threads/psych...

Gotcha! is said (amongst other things) when you have fooled someone successfully; for example if you played an April Fool's trick on someone and they believed it to be true (they "fell for it"), you might say "Gotcha!" when revealing it was a trick. "Psych!" is similar; it's short for "I was psyching you out!" (or similar phrases). It is admitting that you played a "psychological" trick on someone by telling them something believable but untrue.

https://forum.wordreference.com/threads/gotch...

M-W:

psych – 1: PSYCHOANALYZE

2 a: to anticipate correctly the intentions or actions of : OUTGUESS

b: to analyze or figure out (something, such as a problem or course of action) ...

3 a: to make psychologically uneasy : INTIMIDATE, SCARE ...

—often used with 'out'

has a way of psyching out the competition

b: to make (someone, such as oneself) psychologically ready especially for performance —often used with 'up'

psyched herself up for the race

https://www.merriam-webster.com/dictionary/psych

psych! excl.

also psyche! sike!

[abbr. psych (out) under psych v.]

(US campus/teen) fooled you! just kidding!

1985 Eble Campus Sl. Oct.

1989 J. Doyle College Sl. Dict. 🌐 psych! [CMU] just kidding.

1990 King Bee ‘Back by Dope Demand’ 🎵 If you don’t agree, psych!

1998 Source Nov. 87: Big busines went scrambling for the next ‘hot’ little search engine company . . . Sike.

2001 ‘Randy Everhard’ Tattoo of a Naked Lady 238: He pointed the Glock at her head [...] ‘Sike!’ he yelled and started to laugh.‘I’m just messin’ with you-all.’.

2002 (con. 1980s) i80s.com 🌐 psych A term meaning ‘gotcha’! Psych was usually used after telling someone something not true.

2005 onion 13 Apr. 🌐 In fact, I’m feeling like I might just call my boss and tell him off right now. Can I borrow your phone? No problem. I have my cell. Psyche! See, you’ve gotta be on your toes around me. How can I take you seriously if you frighten that easily?

2011 G. Hayward Corruption Officer [ebk] n.p.: Syke! Toto, you’re not in fucking Kansas anymore...2018

Unknown T ‘Mad about Bars’ 🎵 If a boys got grub, then I will try out, sike.

https://greensdictofslang.com/entry/mrzf6ei