His boss gave him some projects to work on, but he failed at it.
His boss told him: "You suck."
And he started sucking his boss, after he was done.
His boss told him: "You suck for life!"
XD
Sucking at Work
Explanation
The humor comes from a double entendre. The boss says 'You suck' meaning the employee is bad at his job. The employee takes this literally and sucks him. The boss repeats the phrase 'You suck for life', because he is bad at his job, but also because he has just been sucked off.
you are bad at life
you completely ruined the joke with the XD.
Oh
Weirdass joke
nun ya
The fuck