'kick in' definitions:

Definition of 'kick in'

From: WordNet
verb
Enter a particular state; "Laziness set in"; "After a few moments, the effects of the drug kicked in" [syn: set in, kick in]
verb
Contribute to some cause; "I gave at the office" [syn: contribute, give, chip in, kick in]
verb
Open violently; "kick in the doors" [syn: kick in, kick down]

Synonyms of 'kick in'

From: Moby Thesaurus