This is the 15898th most frequent Russian word.
пропускающим
"Пропускающим" means "passing," "skipping," or "missing" something, depending on context.
The word 'пропускающим' is used here as an adjective to describe the student, implying habitual action of missing or skipping sessions.
Он был пропускающим тренировки студентом.
He was a student missing his training sessions.
Here, 'пропускающим' is used to indicate an action performed by the subject, qualifying the defender as allowing the ball to go through.
Пропускающим мяч игроком был защитник.
The player letting the ball pass was the defender.
In this context, 'пропускающим' describes the ticket, indicating its function in allowing passage for the passenger.