This is a saying that Panda uses every time Panda-Mama vacuums him up when he is being lazy or disrespectful. "Suwanaide!" ( 吸わないで ) is translated in English to "Don't suck me up!"
"Suwanaide" is also a double entendre, as it could be interpreted as a casual request from a cute panda to the (young) viewers "Please do not smoke" (casual form of "tabako o suwanaide kudasai").