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1.
An attractive girl with an organic look. May or may not involve dreadlocks and hemp clothing/accessories. Magical powers of druid awesome.
Erykah Badu is a total soyboob, yo!
What are you eating? I'm eating a soyboob! You're a sick fuck, cannibal man!
by Erykah Badu December 08, 2007
 
2.
Breast enlargement due to excessive soy consumption which is thought to raise estrogen levels in both men and women.
Dude slow down on the tofurkey, youre starting to grow soyboobs!
by physicsninja November 30, 2009