Letschi is a common nickname for a certain type of people named Leon and/or Leo.

Characteristics of said people are:

Extraordinary, above-average, superior intelligence

Extraordinary, above-average, superior level of laziness and slothfulness

Humour

Spontaneity

God complex

Good guy

Awesome friend

May take forever to get ready

Weeabo

Micro marriging is when your partner manages your personal day-to-day tasks with you much like a Micro Manager at work.