What is I can't be fucked?

Something that somebody says when somebody posts an unfunny GIF on twitter, when their face hasn't changed at all.

Person 1: posts GIF
Person 2: OMG I can't fucking breathe!
Also Person 2: :|

I can't be fucked - video

I can't be fucked - what is it?

"I CAN'T FUCKING TAKE IT ANYMORE, IT'S ALL SUS"

What does "I can't be fucked" mean?

to tired or low energy to do something (Can't be fucked)

Friend 1: did you do the homework
Friend 2: No really I can't be fucked