suck

1 suck /ˈsʌk/ verb
sucks; sucked; sucking
1 suck
/ˈsʌk/
verb
sucks; sucked; sucking
Britannica Dictionary definition of SUCK
1 
a  [+ object] : to pull (liquid, air, etc.) into your mouth especially while your lips are forming a small hole
b  : to pull on (something in your mouth) with the muscles of your lips and mouth
[+ object]
[no object]
c  : to let (something, such as candy or medicine) stay in your mouth as it melts
[+ object]
[no object]
2 
always followed by an adverb or preposition [+ object]
a  : to pull (something) with the force of moving water, air, etc.
b  : to remove (something) from an area or substance by pulling it with the force of moving water, air, etc.
— sometimes used figuratively
3 
[+ object] : to make (part of your body) flatter or tighter by pulling your muscles inward — + in
4 
[+ object] : to cause (someone) to become involved or interested in something — + in or into
— often used as (be/get) sucked in/into
5 
not used in progressive tenses [no object] informal + sometimes impolite
a  : to be very bad or unpleasant
b  : to do something very badly
— often + at

suck it and see

British, informal
: to try something in order to find out if it is good, effective, etc.

suck (someone or something) dry

— see 1dry

suck up

[phrasal verb]
1 
informal + disapproving : to try to get the approval of someone in authority by saying and doing helpful and friendly things that are not sincere — usually + to
— see also suck-up
2 
suck it up US, informal : to do or deal with something unpleasant by making a special effort
— see also 1suck 2b (above)
2 suck /ˈsʌk/ noun
plural sucks
2 suck
/ˈsʌk/
noun
plural sucks
Britannica Dictionary definition of SUCK
[count]