1.kick in
(intransitive, idiomatic) To start, connect, or take effect, especially in a sudden way.
You have to push the switch hard to get the heater to kick in.
I took my medication an hour ago, and it hasn't kicked in yet.
2.cram
To make crude preparation for a special occasion, as an examination, by a hasty and extensive course of memorizing or study.
3.be up
Awake.
I can’t believe it’s 3 a.m. and you’re still up.
4.cross-eye
A form of strabismus in which the eyes converge; esotropia
