MadaHashi
MadaHashi is when Madara and Hashirama get it on like they're fighting, but instead of punching, they're making out. Madara takes the top role most of the time, but Hashirama can flip the script if he feels like it.
'Why are you two making out like you're both on fire?'
'Hashirama just challenged Madara to a kiss battle.'
'Madara called Hashirama a softie and got slapped.'