Cowabunga is a slang term of surprise. It is incorrectly credited as becoming part of the lexicon when it appeared in the Ninja Turtle movies in the early 1990s. In fact this word dates back to 1964 when it was first heard in the movie "Pajama Party".

The act of pulling out a girls tampon during her period and waving it around your head while saying cowabunga

Cowabunga dudes is where 4 men dressed as ninja turtles cum together on a pizza while playing the TMNT theme for 2 minutes.

When someone gets really sick and is almost dying

Saskatoon Conduit Cowabunga
While masturbating, you must first find a dirty space such as a concrete bunker or mall parking garage. You strip naked and then blindfold yourself, and turn yourself upside down. While you jerk off, spin in a circle while referring to yourself as the opposite sex in the 3 rd person. With your other hand, use a sharp piece of metal conduit and stick it up your ass.

When an old female has passed out in the mens bathroom

Pain in the lower back area that can relate to problems with the lumbar spine, the discs between the vertebrae, the ligaments around the spine and discs, the spinal cord and nerves, muscles of the low back, internal organs of the pelvis and abdomen, or the skin covering the lumbar. Treatment of low back pain is optimally directed toward a diagnosed or suspected wallet containment in the back pocket, as advised by Prof. A.N. El-Nabawy of IBM Egypt. For acute lumbar strain, use of a home remedy initially can be beneficial.