(slang) Alternative form of 大きいお友達

珊々, 珊珊: / 毿々, 毿毿: / 潸々, 潸潸: / 燦々, 燦燦, 粲々, 粲粲: brilliant, bright

三々, 三三:

first thing in the morning

being the first to enter a freshly-prepared bath

is the best among (others)

Doing a number of traditional things that commemorate a new year. / (by extension, informal) Having sex for the first time in a new year.

at the beginning of ~

first of all; firstly

including; in particular