STD
Usually in normal conversations stands for Sexually Transmitted Disease however in the 90s, kids referred it to a shitty gaming device that barely worked. People often got confused about this and it often led to hilarious situations such as the one in the example.
Example:
Student(for show and tell): Hey guys, my mom gave me an STD on Christmas.
Everyone: Cool!
The Teacher: *confused expressions*
Student(for show and tell): Hey guys, my mom gave me an STD on Christmas.
Everyone: Cool!
The Teacher: *confused expressions*