커퀴일 (커퀴)
결국 저들 역시 커퀴일 뿐이었으니...

커플 바퀴벌레
Means couple cockroach

It is used when a speaker sighs his/her situation of being a single, and putting couples down. NOT recommended to use the words. NEVER USE directly to couples unless you have relationships with them. 

ex) 커퀴들 죽었으면.
Wish all couples die.