Sentence:  I fucked the <WSD>boi</WSD> that way. His ass had never known how good a man's dick feels when it's deep inside ...<!-- appears to match sense, but full context not available --> 
Meaning of the word marked with <WSD> tags:  A male bottom (i.e. submissive partner), defined not by junior age, but by his obedient role and submission to the dominant "top".