What is Shitslap?
1.
the act of farting into ones own cupped hand and quickly shoving the stench into an unsuspecting victims nostrils. Must be done quickly so as to not lose farts potency
"I was watching tv and minding my own bidness when Shawn straight shitslapped me!"
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2.
When a person screws another person over completely and utterly.
“Oh fuck. Jim has taken my credit cards, and last night he hypnotised me and made me reveal all my bank details and PIN numbers. Now he’s drained all the money from all my accounts, bought a Thai bride and a plane and flew to Cuba where he’ll no doubt take over some seedy drug ring and use my hard, earned cash to buy hookers, cocaine and god knows what else. Fuck, I totally got shitflapped.”
“I knew I wouldn’t get the tenner back, Jim is well known for shitflapping.”
"Ben took your girlfriend? Hmmm, shitslap."
See