When an otherwise unattractive or downright
ugly woman appears to be attractive because she is
the last resort, or "
last shot" a man has at engaging in intercourse for that particular evening.
Another interpretation is that the woman appears attractive only after the man has had "one last shot" of alcohol.
It was
last call at the bar, and
Duane had yet to find a woman at the bar to go home with. In his drunken desperation, the overweight 40-something brunette with a missing front tooth appeared attractive to him. After talking her up and taking her home for coitus, Duane awoke the next morning to her hideous
visage, and found that unfortunately, she was only Last Shot Hot.