The act of driving onto a petrol forecourt and deliberately driving off without paying; to commit a bilking.
Police constable: 'We've had three bilkings at Morrisssons this week.
by Jezzer December 7, 2005
An acronym meaning: Bitch I'd Like to Kill
My ex-wife took me to the cleaners. What a BILK!
by Phuqit July 31, 2008
short for "boi milk"

a healthy way to turn your morning coffee into the first meal of the day
Oh damn where am I going to get 50cc of bilk to make enough boi oysters for tonights dinner party?
by strange_but_true January 5, 2022
to bilk is to steal mainly petrol
"jus bilked bare petrolium get me auntie sue"
by big fat sausage October 1, 2006
Whilst the lady has taken the males penis deep in her throat thus causing the gag reflex to activate and she may have a little vomit. From bile and milking.
I say Terrance Lady Smythe liked the BILKING I gave her but it will take a few washes to get the vom out of my corderoys.
by P4ULI5FIT July 17, 2010
geez did you see Lo last night, she tried to steal my sunglasses, what a BILK
by iheartbigsunglasses November 24, 2006
when someone vomits up chunks of milk or other dairy products because of drinking too much alcohol
"he just bilked everywhere"
by saucy sauce January 6, 2008