Dicks on rice is an adjective that has a “one size fits all” meaning. You define it as you see fit in a variety of moments, although most commonly used to indicate something bad has happened, it can also include every emotion on the spectrum.
After having a reallybad day at school, you walk home and think to yourself
“Wow, today was really some dicks on rice”
The term describing the situation when the sex ratio of male to female in a club is greater than 1:1.
In the case of Too Many Dicks on the Dance Floor, the DJ or who ever has a microphone should notify the excess male population to wait outside or leave until more girls enter or males leave.