Top Definition
Arriving at a destination to purchase some goods for a 'mate'.
'I've just been Checking In for Brian at the local shop.'
by Bill Carr February 12, 2007
Having sex. When one checks in or is checking in, it is either to the Vagina Hotel, or the motel (the butt).
Guy 1 "Hey buddy, were you checking in last night?"
Guy 2 "Nah man the hotel had no vacancy, but I'm gonna try again tonight"
by eyememine January 03, 2010
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