1.VerbTo draw inward using suction. Used other than figuratively or idiomatically: see suck, in.
"This is the component of the vacuum cleaner that sucks in dust.; I sucked in my belly, hoping to hide the extra weight I had put on over the holidays."
2.VerbTo cause (someone) to become slowly more and more involved in some business or situation that may not be to their advantage.
"I really didn't want to be on the committee, but somehow I got sucked in."