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"She told me her dad was Jamie Oliver, but she was blatantly crumblin'"

"He wasn't crumblin' when he said he'd finish off our creme brulees"

"Turns out she wasn't crumblin'- she had made a fruit flan last night"
crumblin' by lemoncurd_luva123 March 21, 2009
(V.) The act of being unreliable

(First popularized by Kyle and Kat on a facetime call)
"Bruh! She told me she was tryna chill and she skipped out at the last minute! That bitch slick crumblin'!"
Crumblin' by Dr Cupkizzle January 28, 2015

crumblin 

im crumblin this chick hardcore man, all she does is reblog spidermemes
crumblin by h_t June 8, 2011

Crumblin 

When she i saw that lady fall, i was on the floor CRUMBLIN'
Crumblin by Spange August 25, 2008

Dublin in Crumlin 

Sex act.

Generally begins with a tap-tap of male genitalia (i.e. one eyed trouser snake) on a shoulder of fellow patron for attention before 'Dublin' down before the next stop
Little on the nose, little in the mouth and in the ear sometimes; nothing like Dublin in Crumlin

Hey-McMann!! Ever try Dublin in Crumlin??

Oh. Is that your stop? Because Ill flick THAT lightswitch; we are ALWAYS Dublin in Crumlin

Is that a stubby thumb or is this the beginning of Dublin in Crumlin?