Adj. A phrase describing a task that is particularly boring and cumbersome. Derived from the common feminine realization that "sucking a dick" is both a chore and boring. The likely origin is the phrase, "This is as boring as sucking a dick," but given the derogatory nature of such a statement, was shortened to be more discrete, for use in situations where the word "dick" would be less than appropriate.
1. Girl, "My boyfriend pounded my vadge only missionary style all last night, it was boring as suck."
Friend, "That's too bad. My Boyfriend gave me a blackjack, it was great!"