1 definition by BeefyCarrot

When you get an errection (usually after waking up) and the tip of your penis pokes through the front of your pants, underwear, or both.
today when i woke up my morning wood ended up being a massive bean sprout.

it was so awkward when my mom woke me up today, i had an awful bean sprout.
by BeefyCarrot October 18, 2011
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