look up any word, like kappa:
 
1.
a strawberry yoohoo is a delicious variation of the also delicious chocolate yoohoo.

STRAWBERRY YOOHOO INGREDIENTS: water, high fructose corn syrup, whey (from milk) and less than 2% of: nonfat dry milk, natural and artificial flavors, sodium caseinate (from milk), corn syrup solids, calcium phosphate, dipotassium phosphate, palm oil, guar gum, xanthan gum, mono and diglycerides, salt, soy lecithin, sucralose, niacinamide (vitamin b3), vitamin a palmitate, riboflavin (vitamin b2), vitamin d3, red 40

CHOCOLATE YOOHOO INGREDIENTS: water, high fructose corn syrup, whey (from milk) and less than 2% of: cocoa (alkali process), nonfat dry milk, natural and artificial flavors, sodium caseinate (from milk), corn syrup solids, calcium phosphate, dipotassium phosphate, palm oil, guar gum, xanthan gum, mono and diglycerides, salt, spice, soy lecithin, niacinamide (vitamin b3), sucralose, vitamin a palmitate, riboflavin (vitamin b2), vitamin d3

it has nothing to do with anyone on their rag.
Example1: a quote from the popular web series Red vs. Blue
"No water? What do you guys drink?" -Doc
"I only drink the blood of my enemies and occasionally a Strawberry Yoo-hoo!" -Sarge

Example2: every day use
"Hold up, I wanna stop at the store and grab a couple strawberry yoo-hoos before we go back to your house. They're delicious!"
by $arge July 20, 2014
 
2.
When you’re girl is on the rag grab an 8OZ Milk Chug and a long straw... Flip her upside down pour the milk in spin several times pop your straw in and take a sip. Yum!
My oldlady was on the rag the other day and she says to me "do you Yoo-Hoo... belly up to the all you can drink Strawberry Yoo-Hoo bar!"
by The Miller August 21, 2006