IF:

without slippng, bobbing, or weaving, that sucks man.

As far as blocking goes, the boxer will use his elbows combined with the waist to "block" most anything. I would think most of the time he would choose to either attack, slip, bob and weave, jump or move. He also has the ability to check the other boxers offending elbows, hips, and shoulders as the fight moves. Many boxer-drills have the boxer checking or manipulating his opponents elbows, hips, and shoulders before-during-and after attacking or defending.

Boxers also duck.