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2.
When a person is clearly going to go out with/ride/meet another person.
"Person A is WELL gettin' stuck into yer one"

-Girl walks past and says hello to person A-
Person B: "Awh man, Stuck in"

Person A: "Your mate is seriously fit"
Person B: "Really? Ya want me to get you stuck in?"
by Murphballz December 10, 2010
 
1.
giving full effort. playing with gusto.
the lads were stuck in on the pitch today!
by dfunkt May 25, 2007