Here are some possible contexts and explanations:
Why? Because the Steam Deck is objectively huge. Compared to a Nintendo Switch or a PlayStation Vita, the Deck is a chunky brick. It has a 7-inch screen (or bigger), massive grips, and weighs nearly 670 grams. It is dekai (huge). uchi wa no utouto maji de dekain portable
うちで歌うとマジでできんポータブル… でもその代わりにになってくれた😸 (“When I try to sing at home, the portable thing never works… but my cat stepped in as a mic instead 😸.”) Here are some possible contexts and explanations: Why
“Our little sleepy guy is massive — but hey, portable.” portable.” "You're really huge
"You're really huge, you know that?" Haru said, nudging him.