definition of
suck in

[1] #1 suck in v. take up as if with a sponge. wn

[2] #2 suck in v. attract by using an inexorable force, inducement, etc.; "The current boom in the economy sucked many workers in from abroad". wn

[3] #3 suck in v. draw in as if by suction; "suck in your cheeks and stomach". wn