The is what you call a girls virgin blood mixed with a guys semen. Happens normally after a guy ejaculates the first time and then keeps going on till he ejaculates a second time.
Yogert can also mean various other things, such as a
"Yogert Male" which is a spinoff to a Sigma/Alpha Male, although Yogert Males tower over any other in comparison.
Yogert can also be put into basically any context, basically a word to describe saying "nothing" after someone just asked you what your doing.
Yogert was found after misspelling yogurt, though the uprise of it was from finding this hilarious comment in a forum from many years ago;
"i love yogert greek yogert to be exact.... soemtiems i eat plain vanilla yogert. i dotn want fruit or nutts or verries in my yogert i like just plain yogert"