used humorously to refer to the bottom part of something
नीचे का हिस्सा
English Usage: That chair has seen better days; the keister part is completely worn out.
Hindi Usage: वह कुर्सी बेहतर दिनों को देख चुकी है; नीचे का हिस्सा पूरी तरह से घिस चुका है।
neechay ka hissa, neeche ka hissa, neech ka hissa
