Islam prohibits taking bad omens
There is no concept of bad omen in Islam. These are all pre-Islamic things and wishful thinking, which are strictly forbidden in Islam. There is a Hadith in Sahih Bukhari:
Translation: It is narrated on the authority of Hadhrat ‘Abdullah bin ‘Umar (May Allah be well pleased with them), that the Holy Prophet (Sallallahu alaihi wa sallam) said, ' …….there is nothing such as a bad omen. (Sahih Bukhari, Hadith No. 5753)
Shouldering a dead body is a virtuous act and is established by the Sunnah. Glad tidings of reward have been given upon this act. If the husband of a pregnant woman shoulders the dead body, it is surely a virtuous act. Taking this as a bad omen is clearly wrong. There is no such concept in Islam. In the Shariah, many rewards of shouldering the bier and walking along with it have been mentioned.
There is a Hadith in Sahih Bukhari:
Translation: It is narrated on the authority of Hadhrat Abu Hurairah (May Allah be well pleased with him), that the Holy Prophet (Sallallahu alaihi wa sallam) said: Whoever joins a funeral Salaat, till he completes it, for him there is one 'Qiraat.' Whoever remains till the burial, for him there are 2 'Qiraat.' Somebody asked: What is Qiraat?' The Holy Prophet (Sallallahu alaihi wa sallam) answered: It is equal to 2 mountains (of reward) (Sahih Bukhari, Hadith No. 1325)
Saying someone has an evil tongue
It is not permissible at all to taunt others that they have an evil tongue. Islam doesn’t permit taking ill omens. There is a Hadith in Sahih Bukhari in this regard:
Translation: No disease comes on its own, taking ill omens is not allowed and there is no bad luck in owls and in the month of Safar (Sahih Bukhari, Hadith No. 5380)
Almighty is the creator of each and everything. Human beings have been ordered to control their tongues and not to utter anything which goes against the wishes of Almighty Allah and His Beloved Prophet (Sallallahu alaihi wa sallam). One should always refrain from lewd and useless talk and should avoid cursing others as well. An “evil tongue” has no role in the acceptance or non-acceptance of supplications.