a big lick
A student who’s so eager to please the teacher they might try to marry them. They’re like a dog who just got a treat and wants to lick the whole floor.
That kid is a big lick. He even brought the teacher coffee on a Monday.
She’s a big lick. She’ll do any homework for the teacher, even if it’s for the next class.
He’s a big lick. He’ll answer every question and then do a backflip for the teacher.